Mott transition as seen from the insulating side

The Mott transition was considered in nonmagnetic and ferromagnetic semicon ductors using an approach from the insulating side. The Mott critical densi ties were determined for some systems, including those which cannot bet con sidered using the standard Mott procedure, e.g., two-electron donors in fer romagnetic semiconductors whose ground state is of the 1s/2s type (EuO with excess Eu, etc.). The transition to the highly conductive state should be continuous or almost continuous. (C) 1999 Published by Elsevier Science B.V . All rights reserved.